Muffler cut-out



Jan, 27.

A. PIEL MUFFLER CUT OUT Filed July 20, 1922 Patented Jan. 27, 19255.

UNITED STATES ARTHUR PIEL, or new YORK, N.-Y.

MUFFLER CUT-OUT.

Application filed July 20, 1922.

To all whom it may concern:

Be it known that I, ARTHUR PIEL, a citizen of the United States and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Muffler Cut-Outs, of which the following is a specilication.

This invention relates to cut-out valves or cut-outs adapted for use with internal combustion engines for cutting out the muffler thereof.

Someof the objects of the present invention are to provide a simple, e-flicient and relatively inexpensive muffler cut-out of separable parts which may readily be machined or disc ground whereby the valve seat is simultaneously machined; to provide a cutout in which the passage of the heated exhaust vapors is directed away from the cutout valve, whereby the temperature of the valve is limited; to provide a cut-out in which the deposit of carbon and other material on the valve seat is effectually prevented; to provide a single yielding means serving the double function of maintaining the cut-out closure in a predetermined lateral position and for maintaining the closure on its seat; and to provide other objects which will appear from the following description taken in connection with the drawing.

Referring to the drawings, Figure I shows the muffler cut-out of my invention applied to the exhaust pipe of an ordinary internal combustion engine; Figure II shows an enlarged view of the cut-out with parts out awa Figure III shows a horizontal section taken on the axial line of the exhaust pipe of Figure II; and Figure IV shows an end View of the cut-out before being applied to the exhaust pipe.

The cut-out is shown applied to a usual exhaust pipe 10 interconnecting an internal combustion engine or other source of compressional waves 11, and a mullier 12. The cut-out serves to provide at desired times a bypass or escape from the interior of the cut-out to the atmosphere.

The cut-out is applied by serving the pipe 10 and joining the severed ends thereof by means of the cut-out structure. In the our bodiment selected for illustration the cutout is formed of a pair of split members 21 and 22, whose cross section is such that Serial No. 576,393.

they form an elongated tube having an inside diameter substantially equal to the outside diameter of the exhaust pipe 10 for which the device is intended. The members 21 and 22 are each provided with a plurality of outwardly extending lugs or ears, such as 23 and 24, each of the ears having an ori- The corresponding lugs and orifices of the two members 21 and 22 are so positioned and proportioned as to be opposite each other when the members are placed in j uxtaposition. Suitable rivets 25 or other fastening means may be provided to fasten the members together to withstand the shocks incident to the engine exhaust.

The members 21 and 22 are notched to form a seat or bearing for a bolt comprising a cylindrical shaft 30, one of the ends of which being enlarged to form a head 31. A boss 32 is formed on the members 21 and 22 and the lower face of the head 31 bears against the surface of the boss, the contacting surfaces being machined to permit free rotation of the head 31 and shaft 30.

The other end of the shaft is milled so as to have a rectangular cross section for a relatively short distance. A tension spring is wound several times around the portion of the shaft 30 immediately adjacent to the outer surfaces of the members 21 and 22, said surfaces being provided witha boss 41 similar to the oppositely disposed boss 32. One end 42 of the spring 40 is bent sharply so as to enter a drill hole in the boss 4L1, as clearly shown in Figure IV. A radially tending arm 13 of suitable length to provide leverage, and having a perforation near one of its ends corresponding to the rectangular section of one end of the shaft '30 (see Figure II) is fitted to said end of the shaft, with a bent end 44 of the spring 40 hooked over one lateral edge. The number of turns of the spring 40 encircling the shaft 30 are such that a pressure must be exerted against the arm 43 to force it on the shaft 40 and into the position shown in Figure III, an opposing pressure being applied against the head 31 while this operation is performed. A pin 45 maintains the arm 13 in place. The compressional resiliency of the spring is such as to yieldingly hold the head 31 against its boss 32. The circumferential re siliency of the spring, which tends to unwind the spring, forces the arm 43 counterclockwise as in Figure II, and restores the ill near the respective ends for the reception of a suitable set screw adapted to strongly engage or bite into the pipe'lO. V Y The offset portion 51 of the inner tube chamber has one of its walls 52 flattened into a plane substantially parallel with the line of cleavage with the members 21 and 22. The wall 52 is cut away to form an aperture 53 of relatively large area.

For normally sealing the apertures 53 there is provided a closure plate 54 corresponding in shape tothe aperture 53 and slightly'la-rger in area so as to form a 1narginal seat 55. The closure plate 54 is socured along oneedge 56 to the shaft 30 in any suitable manner as by welding, the closure plate 54 is secured to the sh-aft 30 in such a way that the plane of the lower face 7 of the plate (Figure II) is substantially coincident with the plane of the interior surface of the flat Wall 52.

For displacing the plate 54 into the position shown in'dotted lines in Figure II, there is provided a usual wire cable or rope 60 attached to the free end of the arm 43 and cxtending around' suitable pulleys, such as 61 (see Figure I), to a pedal or operating lever conveniently positioned.

The manner of assembling the cut-out is evident from the foregoing description, it being necessary to assemble the arm 43, spring 40, pin 45 and closure plate 54 to the shaft 30' before the members 21 and 22 and riveted together. i In operation, the cut-out normally serves merely as a passage for the exhaust gases or other products of combustion emitted by the engine 11 into its exhaust pipe 10. Thus, normally, the gases are directed into the mufller 12, and the compressional waves pro duced the explosion s of an ordinary internal combustion engine are effectively prevented by said mufller from producing ex cessive noise.

During such normal operation, which of course prevails much of the time, the hot exhaust gases, products of combustion, unconsumed vapor, carbon and other matter discharged by the engine are directed angularly with respect to the closure plate 54. Consequently, all this matter, which is necessarily very hot and sticky, is directed away from the closure plate, where the deposit of matterof this nature would tend to cause the closure to leak or stick. Furthermore,

the change from an interior chamber of circular section to a section having flattened walls causes'a swirl in the rapidly moving stream which also serves as a preventative of the deposit thereof within the cut-out. Since the hot gases are directed approximately towards the area generally designated by reference character 70, and thus away from the closure plate 54, the rise in temperature of the closure plate, due to exhaust gases, is limited. The area forms part of the extended wall 71 of the member 21, and as will be seen in Figure IV, the radiating surface thereof is considerable.

Thus it will be seen that I have provided a simple, cheap and efficient cut-out, in which superheated gases are elfectually directed from the closure plate, so that the closure plate is not subjected to excemive tern tures. The carbon and other materiaf d ii charged through the exhaust pipe is deflected away from the closure plate and thus dcposits of such material upon the seat of the closure plate are prevented.

In the manufacture of the cut-out of my invention the surfaces of the ears 23 and 24 and edge surfaces of the members 21 and 22, which are finally placed in intimate contact with each other, can be machined or ground on a disc grinder all at one time; and when member 24 is thus machined the valve seat 55 is also ground. Thus a sin le operation of grindin finishes all of the surfaces necessary to e ground on the rcspective separable parts and a substantial saving in time and cost of manufacture is thus effected. Furthermore, the machined surfaces co-operate to form an intimate contact whereby escape of gases is efi'ectively prevented through the seam.

In the completed cut-out the deflection of the hot gases is so controlled as to direct the gases against a surface having a relatively large area which contains and radiates the heat and safely limits the temperatiire of the cutout.

\Vhile I have shown and described and have pointed out in the annexed claims certain novel features of my invention, it will be understood that various omissions, substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of my invention.

Having described my invention, I claim:

1. In a muffler cut-out adapted to be applied to an exhaust pipe, a pair of separable members secured together in the plane of the axial line of the exhaust pipe, said members being arranged to form a conducting passage for exhaust gases out of alignment with said axial line in at least a portion of the length of said members, one of said members having an aperture in said portion in line with the joint between the members, a hinged closure plate for said aperture, and means for chsplacing said closure plate.

2. In a muffler cut-out adapted to be applied to an exhaust pipe, a pair of separable members secured together to form a conducting passage for the exhaust gases] constructed so that the end portions thereof are substantially in alignment, one of said members having an intermediate portion offset to the plane of the joint between said members and an aperture in said offset portion, and a hinged closure plate for said aperture.

3. In a muffler cut-out, a pair of separable members arranged to be secured together to form a conducting passage for ex haust gases, having circular end portions gradually merging into a rectangular offset central portion.

4. In a muffler cut-out, a pair of separable members arranged to be secured together in opposite relation to form a conducting passage for exhaust gases, constructed so that the end portions of the passage are substantially circular in cross section and so that the intermediate portion is rectangular in section, said intermediate section being offset with respect to the end portions, whereby swirls and eddies are caused to be formed in the moving gases to prevent deposit of solid material within said members.

5. In a muffler cut-out, a pair of separable members arranged to be secured together in opposite relation to form a conducting passage for gases, constructed so that the end portions thereof are substantially mutually in alignment and the intermediate portion is offset with respect to said end portions.

6. In a muffler cut-out, a pair of separable members arranged to be secured together in opposite relation to form a conducting passage for gases, constructed so that the end portions thereof are substantially mutually in alignment and the intermediate portion is offset with respect to said end portions, the intermediate portion of said cut-out having an opening in a side wall thereof, and a removable cover plate for said opening adapted when removed to direct the exhaust gas outwardly through said openin 7. In a muffler cutout, a pair of separable members arranged to be secured together in opposite relation to form a conducting passage for gases, constructed so that the end portions thereof are substantially in mutual alignment and so that the intermediate portion is offset with respect to said end portions, the intermediate portion of said cuto-ut having an opening in a side wall thereof, and means for holding said members together.

8. In a muffler cutout, a pair of separable members arranged to be secured together in opposite relation to form a conducting passage for gases, constructed so that the end portions thereof are substantially in alignment and so that the intermediate portion is ofise-t with respect to said end portions, the intermediate portion of said outout being adapted to be applied to an exhaust pipe, having an opening in a side wall thereof, and means for maintaining said outout in position on said exhaust pipe.

9. In a mufiier cut-out, the combination with the exhaust pipe of a drum having its end portions secured substantially in alignment with said pipe and having an intermediate portion offset out of alignment with said pipe, said offset portion having on the part of its wall most nearly in alignment with said exhaust pipe an opening forming a bypass, and a valve seat removably mounted to form a closure for said by-pass.

10. In a muffler cut-out, the combination with the exhaust pipe of a drum having its end portions secured substantially in alignment with said pipe and having an intermediate portion offset out of alignment with said pipe, said portion having on a part of its wall most nearly in alignment with said exhaust pipe an opening forming a by-pass, and a valve seat removably mounted to form a closure for said bypass, the wall of the intermediate portion opposite said opening having a relatively extensive surface area for radiating heat.

11. In a muffler cut-out, the combination with the exhaust pipe, of two separable members connected together to form a conducting passage for the exhaust gases having their end portions substantially in alignment and adapted tobe secured to spaced sections of the exhaust pipe, one of said members hav ing an intermediate portion provided with an aperture and a valve seat around said aperture and being offset to bring said valve seat flush with the meeting edges of said member, and a hinged closure plate adapted to engage said valve seat to close the aper ture.

12. In a muffler cuto-ut, the combination with the exhaust pipe, of a muffler cut-out chamber formed of two separable members having attaching lugs adjacent their meeing edges and connected together to form a conducting passage for the exhaust gases, one of said members having an intermediate portion offset with respect to the end portions of said member to bring said intermediate portion flush with said attaching lugs, an aperture in said intermediate portion, and a hinged closure plate for said aperture.

Signed at New York in the county of New York and State of New York this 10th day of July, 1922.

ARTHUR PIEL. 

